Lemon & yogurt chicken flatbreads

Ingredients

• 2 skinless chicken breasts, cut into strips
• 1 lemon
• 1 tsp dried oregano (optional)
• 1 garlic clove, crushed
• pinch of cinnamon
• 1 tbsp olive oil
• 4 flatbreads
• 4 tbsp Greek yogurt
• ¼ red pepper, finely chopped
• 1 Little Gem lettuce, finely chopped